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If m arc AB = 120°, then which of the following have measures of 60°? (pick as many as you want)

a)∠ADB
b)∠ACD
c)∠BCA
d)∠BAD
e) m arc BC

If m arc AB 120 then which of the following have measures of 60 pick as many as you want aADB bACD cBCA dBAD e m arc BC class=

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nobillionaireNobley
<BCA, <ADB, measures 60 degrees.

The correct answers are:

a)∠ADB; and c)∠BCA.

Explanation:

The measure of an intercepted arc is twice as much as the measure of its inscribed angle. AB corresponds with both ∠ADB and ∠BCA. Since the arc is 120°, each angle would be half of that, or 60°.

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